Napoleon kept busy at Dresden. Men were continually coming and going, and the Emperor was actively working over the details, political and military, of the vast expedition he was getting ready. Marie Louise, who wished to avail herself of his few moments of leisure, scarcely left the palace, and it was to no purpose that her step-mother, the Empress of Austria, tried to represent this devotion as something ridiculous.
There was a sort of hidden rivalry between the two Empresses. Napoleon had had all the crown diamonds brought to Dresden, and Marie Louise was literally covered by them. General de Ségur says: "She completely effaced her step-mother by the splendor of her jewels. If Napoleon demanded less display, she resisted him, even with tears, and the Emperor yielded the point from affection, fatigue, or distraction. It has been said that, in spite of her birth, this princess mortified the pride of the Germans by some thoughtless comparisons between her new and her former country. Napoleon blamed her for this, but very gently. The patriotism with which he had inspired her gratified him; he tried to set matters right by numerous presents." The Empress of Austria was compelled to conceal her ill-will. She was present almost every morning when Marie Louise was dressing, ransacked her step-daughter's laces, ribbons, stuffs, shawls, and jewels, and carried something off almost every day.
The Emperor Francis pretended not to notice the jealousies of his wife and his daughter. He spent a good part of every day in walking about the town, and was somewhat surprised at the enormous amount of work which his son-in-law did. He sought to gratify the mighty Emperor by telling him that in the Middle Ages the Bonaparte family had ruled over Treviso; that he was sure of this, for he had seen the authentic documents that proved it. Napoleon replied that he took no interest in it, that he preferred being the Rudolph of Hapsburg of his family. The little genealogical flattery produced its effect, nevertheless, and Marie Louise was much pleased by it.
Napoleon was on the point of leaving Dresden, when Frederic William, King of Prussia, arrived there. A treaty, signed February 24, 1812, bound this prince to furnish for the next campaign twenty thousand men, under a Prussian general, but bound to obey the commander of the French army corps to which they should be assigned. Austria, by a treaty concluded March 14, had promised to furnish a corps of thirty thousand men, commanded by an Austrian general, under Napoleon's orders. Prussia especially suffered under such a condition of things, and the memory of Jena had never been keener or more distressing. The occupation of Spandau and Pillau by the French, and the ravages inflicted on the kingdom by the troops marching towards Russia, had much disturbed and grieved Frederic William, who imagined that Napoleon meant to dethrone him. Being very anxious to have early information about the lot that awaited him, he sent to Dresden M. von Hatzfeld, the great Prussian nobleman whom Napoleon had wanted to have shot in 1806, and to whom he had later become much attached, which shows, as Thiers has said, that it is well to think twice before having any one shot. Through M. von Hatzfeld the King of Prussia requested an interview with the Emperor in Berlin. The Emperor made answer that Berlin was not on his road, that he could not go there, but that he would be glad to see the King in Dresden.